Electro-therapeutic faradic current generator

Abstract

Therapeutic faradic current generators are used for stimulation of muscles and nerves of a body. Disclosed is such a generator in one embodiment having a unijunction transistor relaxation oscillator that feeds a Schmitt trigger, the output of which gates a power oscillator. The power oscillator drives a pair of electrodes that are put in contact with the skin.

I claim: 
     
       1. A faradic current generator, comprising a single transistor relaxation oscillator having an adjustable firing rate;   a pair of transistors connected to operate as a Schmitt trigger, with two opposite-phased outputs and interconnected emitters, and to receive, at the interconnection of the emitters, the oscillator's output;   a single transistor buffer amplifier, having its input connected to one end of the Schmitt trigger outputs;   a second single transistor amplifier, having its input connected to the other one of the Schmitt trigger outputs, and having a light-emitting diode in the output thereof;   a power oscillator, having two transistors connected in a push-pull configuration, and connected to the output of the buffer amplifier in such a way that a pulse from the buffer amplifier triggers an alternating current burst in the output of the power oscillator for approximately the duration of the pulse; and   means for connecting electrodes to the output of the power oscillator.